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CENIntegrated Climate Data Center ICDC

Photo: getty images/L. Calvetti

CanESM5

The CanESM5 model (Swart et al., 2019) uses the CLASS-CTEM3.6 land surface model and the CanAM5 atmospheric model at T63 spectral resolution (approx. 2.8∘) and with 49 vertical levels. These are coupled every 3 h to a customized version of the NEMO 3.4.1 model, with 45 vertical levels and a nominal 1∘ horizontal resolution on the tripolar ORCA1 grid. CanESM5 uses the LIM2 sea ice model embedded within NEMO and discretized on the same grid, using a single thickness category each for ice and snow and an elastic–viscous plastic rheology (Madec, 2016; Fichefet and Morales Maqueda, 1997). There is no penetration of insolation through snow, and there is no representation of lateral melt. Sea ice dynamics and thermodynamics are computed within LIM2, while radiative fluxes are computed within CanAM5 and passed to LIM2 via the coupler (Swart et al., 2019).

Radiation is calculated using the radiation scheme from CanAM5, as described in von Salzen et al. (2013). Albedos for the bare ice and snow are computed for the four wavelength intervals used by the atmospheric model (von Salzen et al., 2013). The bare-ice and melt pond albedos are based on the parameterizations of Ebert and Curry (1993).  The snow albedos are computed using the same parameterization used over land which accounts for snow grain growth and the presence of black carbon deposited from the atmosphere.

Institution: Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Victoria, Canada
Model: Canadian Centre for Climate Modelling and Analysis Earth System Model version 5 (CanESM5)
Resolution: aerosol: 500 km, atmos: 500 km, atmosChem: 500 km, land: 500 km, landIce: 500 km, ocean: 100 km, ocnBgchem: 100 km, seaIce: 100 km
Components: aerosol: interactive, atmos: CanAM5 (T63L49 native atmosphere, T63 Linear Gaussian Grid; 128 x 64 longitude/latitude; 49 levels; top level 1 hPa), atmosChem: specified oxidants for aerosols, land: CLASS3.6/CTEM1.2, landIce: specified ice sheets, ocean: NEMO3.4.1 (ORCA1 tripolar grid, 1 deg with refinement to 1/3 deg within 20 degrees of the equator; 361 x 290 longitude/latitude; 45 vertical levels; top grid cell 0-6.19 m), ocnBgchem: Canadian Model of Ocean Carbon (CMOC); NPZD ecosystem with OMIP prescribed carbonate chemistry, seaIce: LIM2
Contact: Neil C. Swart, email: neil.swart (at) canada.ca
References: Swart, N. C., Cole, J. N. S., Kharin, V. V., Lazare, M., Scinocca, J. F., Gillett, N. P., Anstey, J., Arora, V., Christian, J. R., Hanna, S., Jiao, Y., Lee, W. G., Majaess, F., Saenko, O. A., Seiler, C., Seinen, C., Shao, A., Sigmond, M., Solheim, L., von Salzen, K., Yang, D., and Winter, B.: The Canadian Earth System Model version 5 (CanESM5.0.3), Geosci. Model Dev., 12, 4823-4873, 2019, https://doi.org/10.5194/gmd-12-4823-2019
Information: https://cera-www.dkrz.de/WDCC/ui/cerasearch/cmip6?input=CMIP6.ScenarioMIP.CCCma.CanESM5